Music-leaf turner.



F. AGKERMAN & J. H. SULLIVAN. MUSIC LEAF TURNER.

APPLICATION FILED APR.2,1914.

1, 1 12,400. Patented Sept. 29, 1914.

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UNITED STATES PATENT OFFICE.

FREDERICK ACKERMAN AND JAMES H. SULLIVAN, or VANCOUVER, BRITISH COLUM- BIA, CANADA.

MUSIC-LEAF TURNER.

Specification of Letters Patent.

Patented Sept. 29, 1914.

Application filed April 2,1914. Serial No. 829,100.

To all whom it may concern Be it known that we, FREDERICK AGKER- MAN, a subject of the Emperorof Germany, and JAMES H. SULLIVAN, a citizen of the United States, both residents of thecity of Vancouver, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in M11SlC LBRT Turners, of which the following 1s a spoolfication.

Our invention relates to improvements in music leaf turners of the class shown in the application for United States Patent, prepared and executed by us on the 13th day of February, 1911, which application was filed on the 6th day of March, 1914:, under Serial No. 822,876, the apparatus thereln shown comprising a series of tubular members rotatably disposed within each other, and suitably supported on a base, leaf engaging arms carried by each of the tubular members, mechanism for successively rotating the tubular members, and a lever for actuating the mechanism.

Our present invention consists in the improved construction of the mechanism for rotating the tubular members and of the lever for operating the said mechanism, and the object of our invention is to devlse a means whereby-the leaf engaging arms are actuated automatically and in a much quicker manner than is possible in the device as shown in the application referred to, 1n which the said arms are described as actuated by a lever moved by the hand of the player during the complete travel of the leaf engaging arm from right to left, whereas in our present device the movement of the arms is automatic, a quick and slight touch of the hand on the lever being all that is necessary to actuate the mechanism to rotate the arms.

We attain this object by the means illustrated in the accompanying drawmgs in which Figure 1 is a side elevation of the lower portion of our device, showing the mechanism. Fig. 2 is a plan view of the mechanism. Fig. 3 is a plan View of the improved lever and operating gear. I r t Similar figures of reference indicate similar parts throughout the several views.

1 is the base of our device, formed of any suitable material and of suitable dimensions.

2 is a wall of the same material as the base 1, which extends around the base on the upper face thereof, being secured firmly thereto and having the threaded holes 3 provided therethrough by means of which holes and suitable screws therefor the cover 4, which cover is shown in Figs. 1 and 2 of the application referred to, is detachably connected to the base 1 to inclose the operating mechanism of the device.

9 is a plate carried by the base 1 and supported at a suitable height therefrom by means of the corner posts 10, the lower ends of which posts are rigidly secured into the base while their upper ends are adapted to receive the screws 11, which screws secure the plate 9 to the posts 10.

The operating rods are, in the device taken for illustration, four in number, 11, 12, 13, and 1 1, and are formed of hollow tubing, with the exception of 1 1, which may be either hollow or solid. These rods work within each other, as shown more particularly in Figs. 3 and 5 of the application referred to, that is to say, 11 is the outer rod, through which pass all the rest in the order named, viz., 12 through 11, 13 through 12, and 14: through 13. The operating rods, when assembled together, pass through an opening in the plate 9 and are rotatably supported by the inner rod 14, the lower end of which passes through the base and is shouldered thereon.

15 are pinions secured on' the lower ends of the operating rods. 1

22 is a cylinder adapted to be rotatable between the plate 9 and the upper face of the base 1, on the periphery of which cylinder are provided, at specified positions, sets of teeth 23 which are adapted to engage successively the pinions 15 as the cylinder is rotated. The number and pitch of the teeth 23, it may be here stated, and also of the teeth of the pinions 15, is such that one complete'travel of each set of teeth 23 will cause the respective rod which is actuated thereby through its respective pinion to revolve one-half turn in either direction, according to the rotation of the cylinder 22. The cylinder 22- is rotated by means of the pinion 24, which is secured to the lower end of the cylinder, and the gear 25, which engages the pinion 2 1.

So far the device is as shown in the ap plication referred to, except as regards the operating of the rods and the gear 25. In that application there is a lever 26 secured 'intothe gear 25 by means of which lever the concerned, requires that. the player must-v press the lever 26 around from right to left, keeping the hand on it during the complete movement required tov turn a leaf. Speed of turning the leaves, however, is an important factor in such a device, and it is found the leaves are turned much quicker, by our improved construct on, now to be explalned,

than they are by theconstruction disclosed in the application hereinbefore mentioned.

Heferringnow to the drawings, 27 is. a normally wound-up spring such as awatch spring or its equivalent, secured to the spindle of the cylinder 22 and thepla te 9, and adapted to rotate the cylinder when unwinding.

28 are stops suitably positionedon the periphery of the cylinder 22.

29 is a pawl carried;Ontheunderside of the plate 9, being fulcrumed thereon by means of the pin30 and againstwhich pawl the stops 28 are adapted to, engage successively as the cylinde1i22.rotates. The outer cnd3l of the pawl29 is downwardly.turned and extended so as to be normally engaged against the edge Qfthe lever 32. "The lever 32 i hingedly connected to the gear25, preferably as shown in Fig. 3.

33 is a plate spring, secured to the gear 25 and adapted to bear against the underside of the lever 32 so that the lever, instead. of lying flat, will lie ina normally inclined position, as shown in Fig. l, in which position it bears against the downwardly turned end 31 of the pawl 29.

34 is a spring adapted .to bear, againstv the pawl 29, as shown in Fig. 2, to return same to its normal position, after having been moved by thelever 32.

It will now be seen that when our device is ready for use, itbeing understood that the spring 27 is thenwound-up, the unwinding of the spring 27 and consequent rotation of the cylinder 22 is prevented by the engagement ofpany one of the stops 28 with the pawl 29. Therefore, in order to operate our device, all that, is necessary is simply to touch the outerend of the lever32 quickly to depress same, whereupon the downwardly turned end 31 ofthe pawl 29 is forcedia-way from the lever 32, thus swinging the pawl on the pin 30 and disengagingit'from the stop 28 with which it was then engaged.

its normal; position so that it may engage the succeeding stop 28 and keep the cylinder from rotating until it is necessary to turn another leaf, the foregoing action being then repeated, and snccessively until all the leaves have turned, when, a simple continuous -movement of the lever 32from left to right brings all the leaves backto the commencing position and at the same time re-winds the spring 27 again. derstood, that thestops28are so positioned It. will, of; course, be unthat the distances therebetween allow for the complete turning movement of each of the .leaf engaging arms from right to left at each successive release ofthe cylinder 22.

What, we claimas our invention is:

1. In amusic leaf turner, a. plurality of turnable members having. partial rotary movement about, a common axis, driving mechanism for the turnable members, a spring normally in tension for operating saiddriving mechanism, means for locking thespring in tension, a lever for re-winding the spring andmeans operated by said rewinding lever, for releasing said locking means whereby the spring turns theturnable members individually a predetermined distance.

2. In a music leaf turner, the combination, with vertically supported revoluble tubular members, ofpinions carried by the said tubular members, a normally woundup spring, a reivoluble toothedcylinder operatedby the unwindingofsaidspring and adaptedto successively rotate the SfilCl PlIlw ions, stops on the said cylinder, a suitably mountedpawl adapted to normally engage the saidstops so as to limit eachsuccessive movement of-the cylinder, a pinion vcarried by thecylinder, a. gear engaging sa d pinion, a lever hingedly com ectedto the said gear, said lever being adapted to throw the pawl outrof engagement withsaidstops to free the cylinder and means for returning the, pawl to ll1S .I1OI 1'1 12tlPQSl'tIlQI1, as andfor the purpose specified.

Dated at Vancouver, B. (1., this tenth day ofMarch, A. 1)., 1914i.

FRED ,ACKERMAN. JAMES. H, SULLIVAN. lVitnesses;

JAMES TAYLOR, LEON J LANDER.

Copies of this patent ma.y be obtained for five centsleach, by addressing the. Commissioner of I'atents,

1 wasnlngton, 11.0.! 

